package com.wofish.oauth.interceptor;

import com.auth0.jwt.JWT;
import com.auth0.jwt.exceptions.JWTDecodeException;
import com.wofish.common.utils.StringUtils;
import com.wofish.core.annotation.LoginToken;
import com.wofish.core.annotation.PassToken;
import com.wofish.core.dto.BusiStatus;
import com.wofish.core.redis.JedisService;
import com.wofish.oauth.account.service.IMemberAccountService;
import com.wofish.oauth.exception.UnauthorizedException;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.lang.reflect.Method;


/**
 *
 */
@Slf4j
public class AuthenticationInterceptor implements HandlerInterceptor {

    @Autowired
    private JedisService jedisService;

    @Autowired
    private IMemberAccountService memberAccountService;

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object object) throws Exception {
        String token = httpServletRequest.getHeader("token");// 从 http 请求头中取出 token
        // 如果不是映射到方法直接通过
        if(!(object instanceof HandlerMethod)){
            return true;
        }
        HandlerMethod handlerMethod=(HandlerMethod)object;
        Method method=handlerMethod.getMethod();
        //检查是否有passtoken注释，有则跳过认证
        if (method.isAnnotationPresent(PassToken.class)) {
            PassToken passToken = method.getAnnotation(PassToken.class);
            if (passToken.required()) {
                return true;
            }
        }
        //检查有没有需要用户权限的注解
        if (method.isAnnotationPresent(LoginToken.class)) {
            LoginToken userLoginToken = method.getAnnotation(LoginToken.class);
            if (userLoginToken.required()) {
                // 执行认证
                if (token == null) {
                    log.error("非法操作，请重新登录");
                    throw new UnauthorizedException("非法操作，请重新登录",403);
                }
                // 获取 token 中的 user id
                String uid ;
                try {
                    uid = JWT.decode(token).getClaim("uid").asString();

                    if (uid == null) {
                        throw new UnauthorizedException(BusiStatus.USER_NOT_EXIST.getDesc(),BusiStatus.USER_NOT_EXIST.value());
                    }

                    String accessToken = jedisService.get(uid);
                    log.info("LoginToken uid:{},accessToken:{},token:{}",uid,accessToken,token);
                    if(StringUtils.isBlank(accessToken) || !token.equals(accessToken)){
                        throw new UnauthorizedException(BusiStatus.TOKEN_EXPIRE_INVALID.getDesc(),BusiStatus.TOKEN_EXPIRE_INVALID.value());
                    }
                } catch (JWTDecodeException j) {
                    throw new UnauthorizedException("resource permission",401);
                }
//                MemberAccount account = memberAccountService.selectMemberAccountById(Long.valueOf(uid));
//                if (account == null) {
//                    throw new UnauthorizedException(BusiStatus.USER_NOT_EXIST.getDesc(),BusiStatus.USER_NOT_EXIST.value());
//                }
//                // 验证 token
//                JWTVerifier jwtVerifier = JWT.require(Algorithm.HMAC256(account.getPassword())).build();
//                try {
//                    jwtVerifier.verify(token);
//                } catch (JWTVerificationException e) {
//                    throw new UnauthorizedException("resource permission",401);
//                }

                return true;
            }
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {

    }
    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {

    }
}
